Journal
PHYSICAL REVIEW B
Volume 84, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.235308
Keywords
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Funding
- PICS/CNRS
- JSPS [18360018, 19340078]
- MEXT [22103004]
- AFOSR [AOARD-10-4103]
- Grants-in-Aid for Scientific Research [21244048, 22340107, 19340078, 18360018, 23560020] Funding Source: KAKEN
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Spin- and angle-resolved photoemission spectroscopy measurements were performed on Bi1-xSbx samples at x = 0.04, 0.07, and 0.21 to study the change of the surface band structure from nontopological to topological. Energy shift of the T and L-s bulk bands with Sb concentration is quantitatively evaluated. An edge state becomes topologically nontrivial at x = 0.04. An additional trivial edge state appears at the L band gap that forms at x > 0.04 and apparently hybridize with the nontrivial edge state. A scenario for the topological transition mechanism is presented. Related issues of self-energy and temperature dependence of the surface state are also considered.
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